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材料と環境 Vol. 71 (2022), No. 4

ISIJ International
belloff
オンライン版ISSN: 1881-9664
冊子版ISSN: 0917-0480
発行機関: Japan Society of Corrosion Engineering

Backnumber

  1. Vol. 73 (2024)

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  2. Vol. 72 (2023)

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  3. Vol. 71 (2022)

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  4. Vol. 70 (2021)

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  5. Vol. 69 (2020)

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  6. Vol. 68 (2019)

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  7. Vol. 67 (2018)

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  8. Vol. 66 (2017)

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  9. Vol. 65 (2016)

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  10. Vol. 64 (2015)

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  11. Vol. 63 (2014)

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  12. Vol. 62 (2013)

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  18. Vol. 56 (2007)

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  19. Vol. 55 (2006)

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  20. Vol. 54 (2005)

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  22. Vol. 52 (2003)

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  25. Vol. 49 (2000)

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  26. Vol. 48 (1999)

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  27. Vol. 47 (1998)

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  28. Vol. 46 (1997)

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  29. Vol. 45 (1996)

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  30. Vol. 44 (1995)

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  31. Vol. 43 (1994)

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  32. Vol. 42 (1993)

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  33. Vol. 41 (1992)

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  34. Vol. 40 (1991)

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キーワードランキング

30 Apr. (Last 30 Days)

材料と環境 Vol. 71 (2022), No. 4

鉄不動態皮膜上に作製したカルボン酸イオン自己組織化膜の化学修飾による超薄二次元重合膜の腐食防止作用

志村 正, 荒牧 國次

pp. 105-109

DOI:

10.3323/jcorr.71.105

抄録

An ultrathin （nm order of the thickness）, two-dimensional polymer coating was prepared on the passive film formed in a borate buffer at pH 8.49 by modification of 16-hydroxyhexadecanoate anion HO（CH2）15CO2－ self-assembled monolayer with 1, 2-bis（triethoxysilyl）ethane （C2H5O）3Si（CH2）2Si（OC2H5）3 and octadecyltriethoxysilane C18H37Si（OC2H5）3. The electrode covered with the passive film and two-dimensional polymer was treated in 0.1 M NaNO3 to heal the passive film. The time for passive film breakdown of the complex film, tbd was markedly long, expecting more than 1000 h and the protection efficiency, P（％） was extremely high, more than 99.9％, unless the passive film breakdown occurred. Complete protection against passive film breakdown and markedly high value of P can be investigation of ultimate protective coatings for SDGs in future.

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鉄不動態皮膜上に作製したカルボン酸イオン自己組織化膜の化学修飾による超薄二次元重合膜の腐食防止作用

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Ris

90Sr標準溶液の滴下がSUS 316Lの腐食電位に及ぼす影響の検討

青山 高士, 加藤 千明, 佐藤 智徳, 佐野 成人, 山下 直輝, 上野 文義

pp. 110-115

DOI:

10.3323/jcorr.71.110

抄録

In order to analyze the effect of β-rays on corrosion, the effect of dissolved 90Sr on the corrosion potential of Type 316L stainless steel was investigated. The 90Sr-containing HCl was dropped into the diluted artificial seawater while the corrosion potential was measured. The solution was dropped in two times and the radioactivity of the solution was adjusted to be 0.15 MBq and 1.5 MBq, respectively. As a result, it was found that the potential of Type 316L stainless steel was increased by the drop of 90Sr-containing HCl.

mendeley

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90Sr標準溶液の滴下がSUS 316Lの腐食電位に及ぼす影響の検討

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mendeley

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Ris

電気化学的水素透過法を用いた鋼棒の表面水素濃度評価

石井 龍太, 上庄 拓哉, 藤本 憲宏, 津田 昌幸

pp. 116-120

DOI:

10.3323/jcorr.71.116

抄録

For accurately evaluating the risk of hydrogen embrittlement in steels, the hydrogen concentration near the steel surfaces needs to be determined. An electrochemical hydrogen permeation method to measure sub-surface hydrogen concentration can use steel sheets but not steel bars. Because iron oxide and working strain generated in the manufacturing process that affects hydrogen permeability are present on the sub-surface of steel bars, we need to evaluate steel bars directly. In this report, we research an electrochemical hydrogen permeation method and method to determine the surface hydrogen concentration for steel bars.

mendeley

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電気化学的水素透過法を用いた鋼棒の表面水素濃度評価

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mendeley

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Ris

膜厚制御された液膜下における炭素鋼の電気化学挙動

門馬 悠一郎, 坂入 正敏, 上野 文義, 大谷 恭平

pp. 121-125

DOI:

10.3323/jcorr.71.121

抄録

The effect of solution layer thickness on the atmospheric corrosion of carbon steel was investigated using novel devices fabricated by a 3D printer. These novel devices allowed us to control the solution layer thickness precisely. Potentiodynamic polarization measurements were performed under thickness-controlled solution layer, and oxygen diffusion limiting current density（jlim） and anodic current density（janode） were measured. As the solution layer becomes thinner, jlim increased and janode decreased. This result indicates that corrosion accelerates when the solution layer becomes thinner. The diffusion coefficient of oxygen was calculated as 3.20×10－5 cm2 s－1 from the relationship between jlim and solution layer thickness, and the critical diffusion thickness was estimated to be 0.87 mm.

mendeley

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膜厚制御された液膜下における炭素鋼の電気化学挙動

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